Comparative Evaluation of Shear Bond Strength of Three Commercially Available Glass Ionomer Cements in Primary Teeth.

Murthy SS, Murthy GS - J Int Oral Health (2015)

Bottom Line:
The predominant failure mode was cohesive.Amalgomer CR exhibited statistically significant higher SBS of 6.38 MPa to primary teeth and has better adhesion to the primary teeth compared to the other test materials and can be considered as a restorative material in pediatric dentistry.However, the results of this study should be corroborated with further investigation to reach a definitive conclusion.

Materials and methods: Totally, 90 extracted sound primary molars were selected, and dentin on the buccal surface of crowns was exposed. Specimens were randomly assigned into three groups according to the restorative materials being tested. SBS tests were performed, and the obtained values were statistically analyzed using ANOVA and Tukey tests (P < 0.05). SBS mean values on were recorded in megapascals (MPa) and the mode of failure was assessed using a scanning electron microscope.

Conclusion: Amalgomer CR exhibited statistically significant higher SBS of 6.38 MPa to primary teeth and has better adhesion to the primary teeth compared to the other test materials and can be considered as a restorative material in pediatric dentistry. However, the results of this study should be corroborated with further investigation to reach a definitive conclusion.

Mentions:
The SBS of Miracle Mix ranged from 3.62 MPa to 7.32 MPa with a mean of 5.39 MPa, of Ketac Molar ranged from 2.80 MPa to 6.46 MPa with a mean of 4.84 MPa and amalgomer CR ranged from 4.72 MPa to 8.37 MPa with a mean of 6.38 MPa (Graph 1 and Table 1). Three types of fractures were recorded - Adhesive fracture (Figure 4), cohesive fracture (Figure 5) and mixed type of fracture (Graph 2 and Table 2). The Chi-square statistic (Pearson’s Chi-square) revealed that there was no significant association between the failures and the groups (P = 0.347).

Mentions:
The SBS of Miracle Mix ranged from 3.62 MPa to 7.32 MPa with a mean of 5.39 MPa, of Ketac Molar ranged from 2.80 MPa to 6.46 MPa with a mean of 4.84 MPa and amalgomer CR ranged from 4.72 MPa to 8.37 MPa with a mean of 6.38 MPa (Graph 1 and Table 1). Three types of fractures were recorded - Adhesive fracture (Figure 4), cohesive fracture (Figure 5) and mixed type of fracture (Graph 2 and Table 2). The Chi-square statistic (Pearson’s Chi-square) revealed that there was no significant association between the failures and the groups (P = 0.347).

Bottom Line:
The predominant failure mode was cohesive.Amalgomer CR exhibited statistically significant higher SBS of 6.38 MPa to primary teeth and has better adhesion to the primary teeth compared to the other test materials and can be considered as a restorative material in pediatric dentistry.However, the results of this study should be corroborated with further investigation to reach a definitive conclusion.

Materials and methods: Totally, 90 extracted sound primary molars were selected, and dentin on the buccal surface of crowns was exposed. Specimens were randomly assigned into three groups according to the restorative materials being tested. SBS tests were performed, and the obtained values were statistically analyzed using ANOVA and Tukey tests (P < 0.05). SBS mean values on were recorded in megapascals (MPa) and the mode of failure was assessed using a scanning electron microscope.

Conclusion: Amalgomer CR exhibited statistically significant higher SBS of 6.38 MPa to primary teeth and has better adhesion to the primary teeth compared to the other test materials and can be considered as a restorative material in pediatric dentistry. However, the results of this study should be corroborated with further investigation to reach a definitive conclusion.